Improvement in toy steam-engines



4 A. BUCKMAN. lmprovgment in Steam To No.12 1-,194.

y Engines.

Patented March 5, 1872.

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ALEXANDER BUOKMAN, OF BROOKLYN, NEYY YORK.

lMPROVEMENT IN TOY STE AM=ENGINES.

Specification forming part of Letters Patent No. 124,194, dated March 5, 1872 antedated February 15, 1872.

To all whom it may concern:

Be it known that I, ALEXANDER BUGKMAN, of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Toy Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description thereof, ref erence being had to the accompanying drawing forming part of this specification.

This invention consists'in a novel construction of the boiler of the engine with an inner shell and a corrugated conoidal bottom, whereby the temperature of water in the boiler is prevented from being so easily affected by differences in the external temperature and a greater heating-surface is obtained. It also consists in a removable top or cap to the boiler, which constitutes the bed-plate of the engine, and contains the steam-passages from the boiler to the engine, whereby provision is made for cleaning out said passages from the ends communicating with the inside of the boiler; also, in an adjust-able connecting-rod, by which two engines are connected, and which can be adj usted while in place to get the proper stroke.

In the accompanying drawing, Figure l is a side view of an engine made according to my invention, showing its boiler in section; and Fig. 2 is an inverted plan of the top of the boiler.

Similar letters of reference indicate corresponding parts in both figures.

The engine proper is substantially like that for which I filed an application for Letters Patent on the 4th day of April, 1871, consisting of two oscillating cylinders, a to, whose trunnions are supported in hollow standards I) b, and are kept in place by an interjacent spring. This engine is arranged on the removable head A of the boiler, and its two crank-shafts are connected by a crank on each and an adjustable rod, B. This rod B is made in two pieces, which are screw-threaded on their adjacent ends, the one having a right-hand and the othis provided with an inner shell, D. This shell is perforated with a series of holes, 0 6, near its upper edge, and is there secured to the socket g, which is provided for the reception of the removable head A, but does not touch the bottom of the boiler, a space being left for the circulation of the water to and from its outer and inner sides. The socket g is internally screwthreaded for the reception of a screw-threaded ring or collar on the removable head A. The

head is provided with afilling mouth or nozzle, which is fitted with a cock, and through which the boiler may be filled without removing the head therefrom. The steampassagesffthroughdifficulty I obviate by means of the inner shell- D, which separates the main body of water and steam from those portions immediately adjacent to the outer shell; and, by means of the corrugated conoidal bottom, I obtain a greater heating-surface, and economize the heat by prevcntingits escape around the sides of the boiler. Another difficulty with those engines is that the connecting-rod on some of the parts of the engine is apt to become bent, and thereby lengthened or shortened, so as to alter its stroke. This I remedy by making the connecting-rod of adjustable length, as described, whereby, if the stroke of either of the engines be altered, the rod may be adjusted, without removing it, simply by turning the nut to shorten or lengthen it. Still another ditficultyis experienced, which is of more importance than either of those just mentioned-that of clogging up or incrustin g of the ports, so as to prevent the passage of steam through them. To remedy this, I provide the boiler with a removable head, on which the engines are arranged, and which may be removed for the purpose of cleaning the ports. This may be done, on the removal of the cylinders from their standards, by inserting a pin or wisp of broomcorn first at one end of the ports and then at the other, and Workingit round till cap of the boiler and the bed-plate of the enthey are cleared. gine, and containing the steampassages, as

and for the purpose described. Chums 3. The adjustable connecting-rod formed in What I claim as my invention and desire to two parts, and connected byright and left hand secure by Letters Patent, is screws and a nut, substantially as and for the 1. The boiler provided with a corrugated purpose herein specified. conoidal bottom and with an inner shell which ALEXANDER BUOKMAN. is open at top and bottom to the surrounding Witnesses: Water-space, substantially as herein described. FRED. HAYNES,

2. The removable head A, constituting the R. E. RABEAU. 

